Anastasia Myskina, a finalist last year and the tournament's top-seeded player, advanced to the quarterfinals Wednesday.

Zheng will play Wozniacki in the quarterfinals on Friday at Olympic Stadium. In the other quarterfinals, Myskina plays Martina Sucha of Slovakia, Arvidsson faces Birnerova and second-seeded Li Na of China takes on Tsvetana Pironkova of Bulgaria.